Effects of Brief Fitbit Use on Physical Activity & Cardiometabolic Risk

Melanie M. Adams^1, and Chelsea Freleng²

¹Department of Human Performance & Movement Sciences, Keene State College, Keene, NH, USA

²Peterson Physical Therapy, Amagansett, NY, USA

Cite this paper:
Melanie M. Adams and Chelsea Freleng. Effects of Brief Fitbit Use on Physical Activity & Cardiometabolic Risk. Journal of Physical Activity Research. 2018; 3(2):82-88. doi: 10.12691/jpar-3-2-4

Abstract

Wrist-worn fitness trackers are popular consumer products, but few studies have documented their use as a stand-alone intervention tool. This study examined the effect of wearing the Fitbit Flex on moderate to vigorous physical activity (MVPA), sedentary behavior (SB), self-efficacy (SE), and cardiometabolic risk factors. Participants (n=28, m age = 50.5 yrs) wore the Fitbit for 3 weeks, then were randomly assigned to continue for 3 more weeks (6-week group) or discontinue use (3-week group). Participants were not physically active prior to the study. Accelerometers recorded weekly, work-week and weekend MVPA and SB at baseline and post. BMI, waist circumference, and blood pressure were measured baseline and post. A self-efficacy questionnaire was administered baseline, mid-point, and post. MVPA significantly increased in both groups. The 6-week group performed better on weekend MVPA. SB did not change. Waist circumference decreased significantly in both groups. Overall, there was no change in SE. However, the hypothesized pattern between groups was found. The 6-week group had a small increase in SE while the 3-week group declined non-significantly. Fitbit fitness trackers are effective at increasing MVPA and impact waist circumference, in as little as 6 weeks. However, the mechanism for behavior change is unclear and needs further study. This research is challenging as the features of fitness trackers are constantly changing.

Keywords:
Fitbit physical activity sedentary behavior cardiovascular disease diabetes

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